General Motors Unveils Second Propulsion System for Chevrolet
Volt - VIDEO ENHANCED

Chevrolet Volt E-Flex Fuel Cell
Variant Arrives At Auto Shanghai

E-Flex Hydrogen Fuel Cell Continues Move Toward Electric Drive

Click PLAY button below to watch the Chevy Volt being introduced at the
2007 Detroit Auto Show

SHANGHAI - April 20, 2007: GM's global commitment to developing transportation that
reduces oil use and promotes energy diversity continued today at the
Shanghai Auto Show with the unveiling of the next iteration of the E-Flex
electric architecture, configured with GM's newest, most efficient hydrogen
fuel cell system to date.

This second variant of the E-Flex system uses GM's new fifth-generation
fuel cell propulsion technology and a lithium-ion battery to provide up to
300 miles (483 km) of petroleum- and emissions-free electric driving. The
fuel cell E-Flex is a true Zero Emission Vehicle (ZEV) and operates
all-electric from both hydrogen fuel cell-generated electricity and grid
electricity. It is plug-in capable, adding up to 20 additional miles (34
km) each time it is charged, further reducing trips to the refueling
station.

The E-Flex system is a flexible all-electric production vehicle
architecture that can be configured to run on electricity from a number of
sources. It was first shown in January at the North American International
Auto Show in the Chevrolet Volt concept vehicle. The Volt is a battery
electric vehicle with 40 miles of all electric-range and uses a small
bio-fuel engine with a generator to extend its range to 640 miles (1030
km).

"The beauty of our E-Flex strategy is that it allows us to package
various propulsion systems into the same space depending on what energy is
available locally," said Larry Burns, GM's vice president of Research and
Development and Strategic Planning. "It also provides flexibility in the
sources of energy. We can obtain hydrogen or electricity from a myriad of
renewable sources - wind, solar, geothermal, hydroelectric and biofuels -
or from traditional sources such as natural gas, clean coal, nuclear or
even gasoline.

"E-Flex provides flexibility in two ways: in the propulsion systems that
can be used, and in the sources of energy that can be commercialized to
compete with oil and meet global transportation growth in a sustainable
way."

Independent studies indicate hydrogen fuel cell vehicles offer superior
overall efficiency and fewer greenhouse gas emissions compared to internal
combustion engines running on gasoline, when considering both the creation
of the energy and its use in the vehicle.

GM's fifth-generation fuel cell system is half the size of its
predecessor, yet it provides the same power and performance. The fourth
generation currently powers the Chevrolet Sequel concept vehicle. The
Sequel stores 8 kg of hydrogen and delivers a range of 300 miles (483 km).
The fuel cell Volt will also deliver 300 miles of range, but with only 4.0
kg of hydrogen (75 miles / kg).

GM's advancements are a strong indication that our fuel cell technology
has the potential to be a competitive alternative to the internal
combustion engine - in size, performance, durability and cost.

"Our progress has made us increasingly confident that our fuel cell
propulsion system will be automotive-competitive," said Burns. "But before
this technology can be made widely available, governments, energy suppliers
and infrastructure companies around the world need to collaborate with GM
and the auto industry to develop a market for fuel cell vehicles and
hydrogen fuel."

A variety of technological advancements and lightweight materials
contribute to the efficiency of the Volt. With an estimated curb weight of
3,500 pounds (1,588 kg), it weighs 30 percent less than the Sequel. The
fuel cell propulsion system is packaged entirely under the hood and is
equivalent in size to a four-cylinder engine with automatic transmission.
The Volt also features molded GE plastic panels on the fenders, window
glazings, instrument panel and steering wheel, which offer between 30
percent and 50 percent weight reduction per part.

The E-Flex fuel cell variant also showcases GM's third-generation wheel
hub motors, packaged inside the rear wheel to add considerable torque for
all-wheel electric drive capability. The new coreless motor technology
reduces mass and produces more power compared to the first generation shown
in 2003.